Prunescu, Mihai. “Concrete Algebraic Cohomology for the Group (ℝ, +) or How to Solve the Functional Equation 𝑓(𝑥+𝑦) - 𝑓(𝑥) - 𝑑(𝑦) = 𝑒(𝑥, 𝑦)”. CUBO, A Mathematical Journal 9, no. 3 (December 1, 2007): 39–45. Accessed October 12, 2025. https://cubo.ufro.cl/index.php/cubo/article/view/1586.